Re: [APML] Beginner scanner images

[Jerry Lodriguss <jerry@astropix.com>]

>The shapes of the curves are sure different from the examples in your CD
>and from the results I got when scanning a slide! I'll try a round with the
>tiny
>curves in the middle of the histograms.


Hi Steve,

Every image will have histograms that look different from every other 
image. No two will look exactly alike, so don't let that bother you.



>I had the misimpression it was best to try to accomplish as much tweaking
>as possible in the original scan.

If your scanner will only let you output at 8 bits per channel, then it's 
best to do as much tweaking as you can in the prescan. If you can output at 
a higher bit depth, like 12 or 14 or 16 bits, then you can try to get as 
raw of a scan as possible and do the manipulations in Photoshop.  This 
assumes of course that you are not clipping any of the data from the 
original in the "raw" scan.




>  So far each Auto feature I've disabled
>seems
>to have yielded better results!

That's pretty much the way it works with astro stuff.




>Still its more likely operator error than any
>deficiency on the part of the hardware/software!

It's not error, it's just unfamiliarity with the subtleties of the hardware 
and software.



>The vignetting is something I've become more and more aware of in my shots.
>I really didn't want to tackle radial gradients, but guess thats going to have
>to be
>a standard tool in my toolbox so long as I stick with the TV101. Do you
>suppose
>its possible to develop a "standard radial gradient mask" for my TV101, and
>not have to make a new one each time?


Possibly, if the exposure and film are the same.

Jerry







The book "Photoshop for Astrophotographers" is now finished!

  Go to: http://www.astropix.com/PFA/PFA.HTM










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